Tutorial: C# Regex

[NeedHelp]

I figured I would write this little tutorial about C# and Regex since it is still fresh in my mind.

The code below shows how to remove all spaces from a string:

using System;
using System.Collections.Generic;
using System.Text;

namespace regexconsole
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create a string and display it to the console
            string display = "I have     several   spaces in me";
            Console.WriteLine(display);

            // Replaces all spaces with 1 space
            display = System.Text.RegularExpressions.Regex.Replace(display," +", " ");
            Console.WriteLine(display);

            // Make it pause
            Console.ReadLine();

        }
    }
}

Here is how to determine if a string is a number or not

using System;
using System.Collections.Generic;
using System.Text;

namespace regexconsole
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create an integer and display it
            string number = "64";
            Console.WriteLine(number);

            // Determine if it is a positive number
            if (System.Text.RegularExpressions.Regex.IsMatch(number, ("[0-9]*")))
            {
                Console.WriteLine("This is a number");
            }
            else
            {
                Console.WriteLine("This is not a number!");
            }



            // Make it pause
            Console.ReadLine();

        }
    }
}

That is it for now. I will post more later.

[bassio]

thanks alot man, really nice.

[v0id]

It would be nice if you could tell something about regular expressions, and how they works, for those people there doesn't know what it actually is.
I wouldn't call this a tutorial, it had been better with, "Examples" or something.